Results 31 to 40 of about 2,262,511 (306)

Prediction of Nonsinusoidal AC Loss of Superconducting Tapes Using Artificial Intelligence-Based Models

open access: yesIEEE Access, 2020
Current is no longer sinusoidal in modern electric networks because of widespread use of power electronic-based equipments and nonlinear loads. Usually AC loss is calculated for pure sinusoidal current, while it is no longer accurate when current is ...
Mohammad Yazdani-Asrami   +4 more
doaj   +1 more source

Modelling Magnetisation and Transport AC Loss of HTS Tapes near Ferromagnetic Materials Using an Integral Equation Method

open access: yesApplied Sciences
The integral equation formulation of Maxwell’s equations proposed by Brandt provides an alternative to the H and T-A formulations for modelling high-temperature superconducting (HTS) tapes.
Calvin C. T. Chow   +2 more
doaj   +1 more source

An Adipokinetic Hormone Acts as a Volume Regulator in the Intertidal Gastropod Mollusk, Aplysia californica

open access: yesFrontiers in Endocrinology, 2018
Adipokinetic hormone (AKH) is a multifunctional neuropeptide in the gonadotropin-releasing hormone superfamily. In insects, AKH acts to mobilize energy stores during times of high energetic demand, but has been shown to have other effects.
Anthony W. Martillotti, Pei-San Tsai
doaj   +1 more source

Analysis of AC winding loss of permanent magnet synchronous traction motor with high power

open access: yes机车电传动, 2022
In a multiple-pole and high-power PMSTM with high fundamental frequency, the harmonic frequency of the internal magnetic field increases accordingly. The harmonic magnetic field will induce eddy current in the winding, resulting in high-frequency eddy ...
LI Xiangcheng   +3 more
doaj  

A loss-less superconducting kilo-oersted ac magnetic field system [PDF]

open access: yes, 1977
A simple superconducting system which allows almost loss-less ac magnetic field to be generated in the kilo-oested region and in the frequency range from dc up to more than 1 kHz is described. The behaviour of commercially available superconducting wires
Bos, M.R.E.   +2 more
core   +2 more sources

Role of Flux Diverters in Reducing AC Loss in a Single-Phase 6.5 MVA HTS Traction Transformer for Chinese High-Speed Train Carrying High-Order Harmonic Currents

open access: yesIEEE Access, 2022
The traction transformer is a critical electrical component in high-speed-trains. We are currently building a 6.5 MVA superconducting traction transformer which will increase transformer efficiency to 99%, halve the weight, and avoid the fire risk
Wenjuan Song   +5 more
doaj   +1 more source

Universal dielectric loss in amorphous solids from simultaneous bias and microwave field

open access: yes, 2013
We derive the ac dielectric loss in glasses due to resonant processes created by two-level systems and a swept electric field bias. It is shown that at sufficiently large ac fields and bias sweep rates the nonequilibrium loss tangent created by the two ...
A. L. Burin   +4 more
core   +1 more source

AC loss in large-scale superconducting cables [PDF]

open access: yes, 1993
A review is given of recent work on ac losses, carried out at our institute. The emphasis is on large-scale conductors for fusion applications, such as the `cable-in-conduit¿ prototype conductors to be used for NET.
Mulder, G.B.J.
core   +3 more sources

Evaluation Method and Influence Law of UV-Cured Polyurethane on the Self-Healing Performance of Asphalt and Asphalt Mixtures

open access: yesBuildings, 2023
To explore the effect of UV-curable polyurethane (UV-PU) on the self-healing performance (SHP) of asphalt and asphalt mixtures, this article conducted research in this area of the evaluation method and influenced the law.
Huaizhang Sun   +9 more
doaj   +1 more source

Hysteretic ac losses in a superconductor strip between flat magnetic shields

open access: yes, 2009
Hysteretic ac losses in a thin, current-carrying superconductor strip located between two flat magnetic shields of infinite permeability are calculated using Bean's model of the critical state. For the shields oriented parallel to the plane of the strip,
Aladyshkin A Y   +8 more
core   +1 more source

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